Isa 59:14 So justice is driven back, and righteousness stands at a distance; truth has stumbled in the streets, honesty cannot enter.

Isa 59:15 Truth is nowhere to be found, and whoever shuns evil becomes a prey. The LORD looked and was displeased that there was no justice.

Isa 59:16 He saw that there was no one, he was appalled that there was no one to intervene; so his own arm worked salvation for him, and his own righteousness sustained him.

Isa 59:17 He put on righteousness as his breastplate, and the helmet of salvation on his head; he put on the garments of vengeance and wrapped himself in zeal as in a cloak.

‘Righteousness is the moral integrity of all the Lord will do, salvation is the deliverance of his people, vengeance is the just requital of his foes, and zeal the determination which will bring the work to completion.’ (Motyer)

Isa 59:18 According to what they have done, so will he repay wrath to his enemies and retribution to his foes; he will repay the islands their due.

Isa 59:19 From the west, men will fear the name of the LORD, and from the rising of the sun, they will revere his glory. For he will come like a pent-up flood that the breath of the LORD drives along.

AV – So shall they fear the name of the LORD from the west,
And his glory from the rising of the sun.
When the enemy shall come in like a flood,
The Spirit of the LORD shall lift up a standard against him.

Notice the difference in translation, especially: ‘[the Lord] will come like a pent-up flood’ vs ‘[the enemy shall come in like a flood.’

Isa 59:20 “The Redeemer will come to Zion, to those in Jacob who repent of their sins,” declares the LORD.

‘Paul quotes this passage, (Romans 11:26) in order to show that there is still some remaining hope among the Jews; although from their unconquerable obstinacy it might be inferred that they were altogether cast off and doomed to eternal death. But because God is continually mindful of his covenant, and “his gifts and calling are without repentance,” (Romans 11:29) Paul justly concludes that it is impossible that there shall not at length be some remnant that come to Christ, and obtain that salvation which he has procured. Thus the Jews must at length be collected along with the Gentiles, that out of both “there may be one fold” under Christ. (John 10:16) It is of the deliverance from Babylon, however, that the Prophet treats. This is undoubtedly true; but we have said that he likewise includes the kingdom of Christ, and spiritual redemption, to which this prediction relates. Hence we have said that Paul infers that he could not be the redeemer of the world, without belonging to some Jews, whose fathers he had chosen, and to whom this promise was directly addressed.’ (Calvin)

Isa 59:21 “As for me, this is my covenant with them,” says the LORD. “My Spirit, who is on you, and my words that I have put in your mouth will not depart from your mouth, or from the mouths of your children, or from the mouths of their descendants from this time on and forever,” says the LORD.